CBOE extends VIX index overnight for non-US firms

CBOE Holdings said it plans to start
calculating from Wednesday its flagship VIX index during its
extended trading hours, marking the latest move by the US
exchange group to boost its business from Europe and Asia.

The Chicago-based exchange said values for
the VIX index will be published every 15 seconds from Wednesday
during the exchange’s extended trading session
which runs from 02:00 to 08:15 Central Time, which coincides
with European trading hours and the end of Asia trading.